Center screw filter



Feb. 19, 1952 c. J. Fusco 2,536,021

CENTER SCREW FILTER Filed Nov. 25, 1945 2 SI-EETSSHEET l INVENTOR. (34510 J F0560 Feb. 19, 1952 c, J, FUSCO 2,586,021

CENTER SCREW FILTER Filed NOV. 23 1945 2 SHEETS--SPEET 2 fie. 2.

INVEN TOR. 62 040 (I 1 7/550 Patented Feb. 19, 1952 UNITED STATES PATENT QFFICE CENTER SCREW FILTER Carlo J. Fusco, San Francisco, Calif. Application November 23, 1945, Serial No. 630,356 Claims. (01. 210-185) A further object of the invention is to provide a design of filter press plates and filter sheets that are easily and simply assembled together or disassembled for the removal and replacement of the filter sheets.

A further object of the invention is to provide a filter press of an improved design and filter sheets for use with the same whereby the re moval and replacement of the sheets can be accomplished in a minimum of time and with a minimum of effort.

Other objects and advantages will be more apparent from the following description wherein reference is had to the accompanying two sheets of drawings upon which:

Fig. 1 is a front elevational view of a filter press constructed in accordance with my inven tion.

Fig. 2 is a cross sectional .view of the same taken generally on the line 22 of Fig. 1;

Fig. 3 is a fragmentary cross sectional view through the inlet and associated parts;

Fig. 4 is a fragmentary side elevational view.

In the embodiment of the invention which I have chosen to describe and which is illustrated in the drawings:

In Fig. 1 I have shown a center screw press which may include a pair of upright posts I!) and i2 secured in the base members It and [6. A cross bar l8 may rigidly connect the base members l4 and It. The support posts I!) and I2 may pivotally support the cross frame member 2!] which carries a pair of pin members 22 and 24 that are journalled in bearing portions 26 and upon brackets 30 and 32 secured to the upper ends of the posts l0 and I2. The cross member 20 has a pair of downwardly projecting shoulders 34 and 36 which support the frame and the filter unit in a horizontal position upon the shoulders 38 and 40 formed on the brackets 30 and 32.

The cross frame member 20 may carry a hub portion 42 within which a shaft member 44 is journalled. The shaft is provided with a screw-- threaded portion 56 and an enlarged portion .8 so that the same may be efiectively fastened in the hub 42 by means of a lock-nut member 59.

3 An inlet pipe 52 may be secured in the end of the shaft i l and communicate with a longitudinal passageway 54 therein. The passageway is adapted to provide a communication with the four outlet openings 56 in the enlarged portion 48 of the shaft.

, The center screw filter may be constructed of a pair of generally similarly shaped housing members 58 and 60, both provided with a center bore so that they may be mounted upon the shaft 48 being securely fastened thereon by means of the handwheel 62 that is mounted upon' the screw-threaded portion 64 of the shaft 48. The press housing member is provided with a plurality of ridges 66 and depressions 68 and anv outlet bore 10 which communicates with the outlet pipe 12. Both the housing members 58 and 60 are provided with the peripheral flanges l4 and 16 to permit the-seating therebetween of a filter paper unit 18. Thus, when the two housing members are fastened together by the handwheel 62-, a filter paper is effectively secured about its periphery between the flanges it and 16 and also between the shoulders and 32 of the :housing members 60 and 58 respectively. The

openings 56, or two or more of them, are adapted to communicate with the circular groove that connects with passageways 84 and 86 formed in the hub 88 of the housing member 58.

With the construction above described it can be seen that fluid to be filtered enters the filter unit through the inlet pipe 52, passageway 56, holes 56 and openings 84 and as to a chamber 90 formed in the housing 58. As the pressure of the fluid increases the fluid will pass through the filter paper and out through the outlet pipe 12. The sediment which may be present in the fiuidwill, naturally, be retained in the chamber QGupon the one side of the filter paper. The pipe members 72 and 52 may be connected to flexible hose members so that when it is desired to change filter papers, the filter unit may be swung from a vertical to a horizontal position on the support members described, the handwheel 62 rotated and removed, the filter housing members 58 may be removed and cleaned; the dirty filter sheet may also be removed and a new sheet substituted. With this construction, it is obvious that this change may be made in a matter of minutes, thereby saving a great deal of time over the work necessary to remove or replace filter sheets in filter units which are today in use.

While I have illustrated and described the preferred form of my invention, it will be apparent to those skilled in the art that changes and modifications may be made in the exact details shown and I do not wish to be limited in any particular embodiment; rather what I desire to secure and protect by Letters Patent of the United States is:

1. A filter unit comprising a base, a pair of vertical posts thereon, a pivotally mounted crossframe carried by said posts, a hub portion medially of said frame, a shaft journalled therein and extending therefrom, a pair of housing members mounted on said shaft, each of said housing members having a chamber therein, a hand-wheel screw-threadedly mounted on said shaft for locking said housing members together against the hub portion of said frame with said chambers facing each other, said housings having peripheral meeting flanges around said chambers, a filter paper adapted to be locked around its peripheral edge between said flanges, said shaft having an axial bore therein providing an inlet for fluid to be filtered, radial passageways in said shaft communicating with said bore and with the chamber in one of said housing members and an outlet pipe extending from the other of said housing members whereby fluid to be filtered passes through said filter paper.

2. A filter unit comprising a base, a pair of vertical posts thereon, a pivotally mounted crossframe carried by said posts, a hub portion medially of said frame, a shaft journalled therein and extending therefrom, a pair of housing members mounted on said shaft, each of said housing members having a chamber therein, a hand-wheel screw-threadedly mounted on said shaft for looking said housing members together against the hub portion of said frame with said chambers facing each other, said housings having peripheral meeting flanges around. said chambers, a filter paper adapted to be locked around its peripheral edge between said flanges, said shaft having an axial bore therein providing an inlet for fluid to be filtered, radial passageways in said shaft communicating with said bore and with the chamber in one of said housing members and an outlet pipe extending from the other of said housing members whereby fluid to be filtered passes through said filter paper, said last named housing member having a plurality of ridges and depressions in its face against which said filter paper rests.

3. A filter unit comprising a base, a pivotally mounted cross-frame carried thereby, a hub portion medially of said frame, a shaft journalled therein and extending therefrom, a pair of'housing members mounted on said shaft, said housing members having shallow chambers therein and a peripheral flan e surrounding each of said chambers, said shaft having a fluid passageway therein, a hand-wheel screw-threadedly mounted on said shaft for locking said housing members together against one side of said hub portion of said frame, a filter paper adapted to be looked around, its peripheral edge between the peripheral flanges on said housings, an inlet conduit for fluid to be filtered connected to the passageway in said vertical shaft, passageways from said shaft-to the chamher in one of said housings and an outlet conduit from the chamber in the other of said housing members whereby fluid to be filtered passes through said filter paper.

4. A filter unit comprising a base, a pivotally mounted cross-frame carried thereby, a hub portion medially of said frame, a shaft journalled therein and extending therefrom, a pair of housing members mounted on said shaft, said housing members having shallow chambers therein and a peripheral flange surrounding each of said chambers, said shaft having a fluid passageway therein, a hand-wheel screw-threadedly mounted on said shaft beyond said housing for locking said housing members together against one side of said hub portion on said frame, a filter paper adapted to be looked around its peripheral edge between the peripheral flanges on said housings, an inlet conduit for fluid to be filtered connected to the passageway in said shaft, passageways from said shaft to the chamber in one of said housings and an outlet conduit from the chamber in the other of said housings whereby fluid to be filtered passes through said filter paper, the chamber in said last named housing member having a plurality of ridges and depressions in its face against which said filter paper rests.

5. A filter unit comprising a base, a pivotally mounted cross-frame carried thereby, a hub portion medially of said frame, a shaft journalled therein and extending therefrom, a pair of circular housing members mounted on said shaft, said housing members having circular shallow chambers therein and a peripheral flange surrounding each of said chambers, said shaft having a fluid passageway therein, a hand-wheel screw-threadedly mounted on said shaft for locking said housing members together against the hub portion of said frame, a filter paper adapted to be looked around its peripheral edge between the peripheral flanges on said housings, an inlet conduit for fluid to be filtered connected to the passageway in said vertical shaft, passageways from said shaft to the chamber in one of said housings and an outlet conduit from the chamber in the other of said housing members whereby fluid to be filtered passes through said filter paper.

CARLO J. FUSCO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 321,947 Breyer July 14, 1885 719,438 Crossman Feb. 3, 1903 1,240,385 Sweetland Sept. 18, 1917 1,754,401 Prutzman et al Apr. 15, 1930 1,764,567 Javitch June 17, 1930 2,076,049 Seitz Apr. 6, 1937 2,122,259 McKenna June 28, 1938 2,278,453 Kracklauer Apr. 7, 1942' 2,345,014 Stamsvick Mar. 28, 1944 2,345,259 Hunziker Mar. 28, 1944 FOREIGN PATENTS Number Country Date 9,731 Great Britain May 16, 1895 

